Transient engine performance adaptation method and system

• US 7,672,773 B2
• Filed: 12/01/2005
• Issued: 03/02/2010
• Est. Priority Date: 12/03/2004
• Status: Expired due to Fees

• Current Assignee: HINO Motors Limited (Toyota Motor Corporation)
• Original Assignee: HINO Motors Limited (Toyota Motor Corporation)
• Inventors: Urano, Yasunori, Nakano, Yutaka
• Primary Examiner(s): Moulis; Thomas N
• Application Number:
  US11/791,644
• Publication Number:
  US 20080306671A1
• Time in Patent Office: 1,552 Days
• Field of Search: 702182-185, 700/26, 701 99-110
• US Class Current: 701/102
• CPC Class Codes: F02D 2041/1433 using a model or simulation of the system
• CPC Class Codes: G01M 15/05 by combined monitoring of two or more different engine parameters

Abstract

The present invention makes it possible to cope with a plurality of standardized transient operation modes in a method for adapting the engine transient characteristic to a required performance targets and a system therefore. When there are a plurality of prescribed standardized transient operation modes, transient testing is conducted in a single transient operation mode that covers changing patterns of control values of control factors of the plurality of transient operation modes. Only data in a data distribution range to be focused on is captured to create a transient engine model.

Claims

1. A transient engine performance adaptation method executing the steps of:

conducting transient testing, during which an engine is operated in a transient state by making changes to control values of control factors supplied to the engine and its output is captured;

capturing engine output data produced by the transient testing and creating a transient engine model of the tested engine based on the relationship between the output data and data concerning the control factors supplied to the engine;

obtaining control values of control factors that satisfy transient performance targets required of said engine, using the transient engine model that has been created;

confirming whether the required transient performance targets are satisfied by conducting transient testing by supplying the control values obtained from the transient engine model to the real engine; and

creating control software for a control circuit controlling the engine if the confirmation step finds that the required transient performance targets are satisfied,

wherein the transient performance targets are set on a condition that the step of conducting the transient testing is executed by changing control values of the control factors in accordance with a prescribed standardized transient operation mode, and

the step of conducting the transient testing is executed, when there are a plurality of the prescribed standardized transient operation modes, in a single transient operation mode that covers changing patterns of control values of the control factors of the plurality of transient operation modes.

2. The transient engine performance adaptation method according to claim 1,

wherein for each of the plurality of transient operation modes, a data distribution range to be focused on of the engine output data produced by the transient testing is specified, and

the step of creating a transition engine model executes a step of capturing only data in the data distribution range to be focused on.

3. A transient engine performance adaptation system comprising:

real engine transient test execution means for conducting transient testing by making changes to control values of control factors of an engine;

transient engine model creation means for capturing engine output data obtained by the transient testing and creating a transient engine model describing the relationship between control input and the output data of the engine based on said output data and the control values supplied to said engine by the real engine transient test execution means;

transient engine model simulation means for obtaining control values of the control factors, at which the transient engine model satisfies transient performance targets required of the engine during transient testing, using the transient engine model created by the transient engine model creation means; and

means for supplying the real engine transient test execution means with the engine control values satisfying the transient performance targets obtained by conducting the simulation using the simulation means,

wherein the transient performance targets are set on a condition that the real engine transient test execution means conducts transient testing by changing control values of the control factors in accordance with a prescribed standardized transient operation mode, and

the real engine transient test execution means is provided with means for conducting, when there are a plurality of the prescribed standardized transient operation modes, the transient testing in a single transient operation mode that covers changing patterns of control values of the control factors of the plurality of transient operation modes.

4. The transient engine performance adaptation method according to claim 3,

wherein for each of a plurality of transient operation modes, a data distribution range to be focused on in the engine output data produced by the transient testing is specified, and

the transient engine model creation means is provided with means for capturing only data in the data distribution range to be focused on.